X-ray mate (1 move)

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In x-ray mate, the piece delivering checkmate is also x-ray-protecting a piece on the other side of the king, which guards one or more escape squares.


Black can deliver x-ray mate with Rh1#.
The rook protects the pawn on h4, which is guarding the escape square on g3.

Black can deliver x-ray mate with Qd4#.
The queen protects the rook on b2, which guards the escape squares d2, c2, b3, and b4.

Related patterns

X-ray mate

In X-ray defence, an attacked piece is protected "through" the attacking piece.
X-ray mate is an x-ray defence and a checkmate at the same time.